package com.sky.service.impl;

import com.alibaba.fastjson.JSONObject;
import com.sky.dto.UserLoginDTO;
import com.sky.entity.User;
import com.sky.mapper.UserMapper;
import com.sky.properties.WeChatProperties;
import com.sky.service.UserService;
import com.sky.utils.HttpClientUtil;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.time.LocalDateTime;
import java.util.HashMap;
import java.util.Map;

@Service
public class UserServiceIml implements UserService {
    public static final String WX_LOGIN = "https://api.weixin.qq.com/sns/jscode2session";
    @Autowired
    private WeChatProperties weChatProperties;
    @Autowired
    private UserMapper userMapper;
    //登录
     public User wxlogin(UserLoginDTO userLoginDTO) {
         String openid = getString(userLoginDTO);

         //判断openid是否为空
        if(openid == null){
            throw new RuntimeException("openid为空");
        }

        //判断用户是否存在
        User user = userMapper.selectByOpenid(openid);
        if(user == null){
            //用户不存在，创建新用户
            user = User.builder()
                    .openid(openid)
                    .createTime(LocalDateTime.now())
                    .build();
            userMapper.insert(user);
        }
        return user;
    }



    private String getString(UserLoginDTO userLoginDTO) {
        Map<String, String> map = new HashMap<>();
        map.put("appid", weChatProperties.getAppid());
        map.put("secret", weChatProperties.getSecret());
        map.put("js_code", userLoginDTO.getCode());
        map.put("grant_type", "authorization_code");
        String json = HttpClientUtil.doGet(WX_LOGIN, map);

        JSONObject jsonObject = JSONObject.parseObject(json);
        String openid = jsonObject.getString("openid");
        return openid;
    }
}
